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n. pl. pol·lin·i·a (-ē-ə)
A coherent mass of pollen grains typically transferred as a unit during pollination, found in the flowers of certain plants such as orchids and milkweeds.

[New Latin, from pollen, pollin-, pollen; see pollinate.]


n, pl -ia (-ɪə)
(Botany) a mass of cohering pollen grains, produced by plants such as orchids and transported as a whole during pollination
[C19: New Latin; see pollen]


(pəˈlɪn i əm)

n., pl. -lin•i•a (-ˈlɪn i ə)
an agglutinated mass of pollen grains, characteristic of plants of the orchid and milkweed families.
[1860–65; < New Latin pollin-, s. of pollen pollen]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.pollinium - a coherent mass of pollen grains (as in orchids)
pollen - the fine spores that contain male gametes and that are borne by an anther in a flowering plant
References in periodicals archive ?
Floral architecture and floral dimensions limited the number of visiting animals that functioned as legitimate pollinators as the pollinium or pollinarium was fixed specifically to the part of the vector's body that contacted the receptive stigma when it visited a second flower on a second plant of the same species.
Instead, the pollen grains are released as aggregates called "pollinia." A slender stalk connects a pollium to a sticky base that adheres the entire pollinium, containing thousands of pollen grains, to a pollinator.
Though we did not recorded pollinium removal, as on many orchid species, flowers of R.
Pollination is effected when a pollinium is inserted into one of five stigmatic chambers by an insect vector (Queller 1983, Morse 1987, Wyatt and Broyles 1994).
There are two anthers, each containing a pollinium. The pollinium is not discrete and waxy, as in most orchids, but is a mass of sticky pollen that is usually removed as a unit when touched (Plowright et al.
To ensure maximum seed set, each pollination used a complete pollinium (all four lobes).
Pollen development and cohesion in a mealy and a hard type of orchid pollinium. Int.
Each pollinium carries sufficient pollen to produce a mature fruit (Wyatt 1976); thus, it is meaningful to quantify pollen movement via pollinia.
Pollination is completed when a single pollinium is deposited into one of the five stigmatic chambers on another flower.